Make TabContents ctor private; poke hole for existing callers.

chrome/browser/ui/cocoa/web_intent_picker_cocoa.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/cocoa/web_intent_picker_cocoa.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/bind.h"
 #include "base/message_loop.h"
@@ skipping 144 matching lines @@
   // We don't handle individual icon changes - just redo the whole model.
   PerformLayout();
 }
 
 void WebIntentPickerCocoa::OnInlineDisposition(const string16& title,
                                                const GURL& url) {
   content::WebContents* web_contents = content::WebContents::Create(
       tab_contents_->profile(),
       tab_util::GetSiteInstanceForNewTab(tab_contents_->profile(), url),
       MSG_ROUTING_NONE, NULL);
-  inline_disposition_tab_contents_.reset(new TabContents(web_contents));
+  inline_disposition_tab_contents_.reset(
+      TabContents::Factory::CreateTabContents(web_contents));
   Browser* browser = browser::FindBrowserWithWebContents(
       tab_contents_->web_contents());
   inline_disposition_delegate_.reset(
       new WebIntentInlineDispositionDelegate(this, web_contents, browser));
 
   // Must call this immediately after WebContents creation to avoid race
   // with load.
   delegate_->OnInlineDispositionWebContentsCreated(web_contents);
 
   inline_disposition_tab_contents_->web_contents()->GetController().LoadURL(
@@ skipping 62 matching lines @@
 }
 
 void WebIntentPickerCocoa::OnChooseAnotherService() {
   DCHECK(delegate_);
   delegate_->OnChooseAnotherService();
   inline_disposition_tab_contents_.reset();
   inline_disposition_delegate_.reset();
   [sheet_controller_ setInlineDispositionTabContents:NULL];
   PerformLayout();
 }